The Integrated Noise Model (INM) is a computer model that evaluates aircraft noise impacts in the vicinity of airports. It is developed based on the algorithm and framework from SAE AIR 1845 standard, which used Noise-Power-Distance (NPD) data to estimate noise accounting for specific operation mode, thrust setting, and source-receiver geometry, acoustic directivity and other environmental factors. The INM can output either noise contours for an area or noise level at pre-selected locations. The noise output can be either exposure-based, maximum-level-based, or time-based.

What is INM Designed to Do?

In the United States, INM is preferred model typically used for FAR Part 150 noise compatibility planning and for FAA Order 1050 environmental assessments and environmental impact statements. The INM has many analytical uses, such as:

  • Assessing current aircraft noise impacts around a given airport or heliport
  • Assessing changes in noise impact resulting from new or extended runways or runway configurations
  • Assessing changes in noise impact resulting from new traffic demand and fleet mix
  • Evaluating noise impacts from new operational procedures
  • Evaluating noise impacts from aircraft operations in and around National Parks

INM Version 7.0d

INM Version 7.0d is the most recent release of INM. It includes database updates and correction of minor software issues, but no new functionality added relative to INM Version 7.0c.

Database Updates and Changes

INM Version 7.0d includes the addition of several new aircraft types to the INM system database, including three Boeing jets, and four Embraer jets. The new aircraft are the:

  • Boeing 747-8F Freighter
  • Boeing 777-300ER
  • Boeing 787-8 Dreamliner
  • Embraer ERJ-170-100
  • Embraer ERJ-170-200
  • Embraer ERJ-190-100
  • Embraer ERJ-190-200

INM Version 7.0d also includes noise data updates for five Bell helicopters, and include the addition of EPNL and PNLTM noise-power-distance (NPD) data. The affected aircraft types are the:

  • Bell 206B-3
  • Bell 407
  • Bell 427
  • Bell 429
  • Bell 430

INM Version 7.0d includes an updated standard aircraft substitution list. Two new aircraft were added to the substation list, and one was deleted. The update is based on comprehensive review of aircraft characteristics and references a new aircraft added in INM Version 7.0d. Furthermore, the INM substitution list was expanded to include 125 helicopter substitutions. This list is presented in the INM Version 7.0d release notes, and is not included directly in the software. This additional information has been provided to assist users in selecting appropriate helicopter substitutions for those helicopters that are not in the INM database.

Minor corrections were also made to the data for several existing aircraft for INM Version 7.0d, details of which can be found within the INM 7.0d Release Notes.

Program Modifications and Corrections

Several minor program modifications and bug fixes were made for INM Version 7.0d. These are described in detail in the INM Version 7.0d Release Notes.

Previous Versions of INM

INM Version 7.0d, released on May 30, 2013, is a free update to INM Version 7.0. You must already have INM Version 7.0, Version 7.0a, Version 7.0b or Version 7.0c installed to use this update. If you do not already have the previous version, you can order a complete software package using the INM 7.0d Order Form available below. The INM 7.0 User's Guide and Technical Manual are the current manuals for INM 7.0d.

The files below comprise the INM Version 7.0d update, installation instructions, and order form.

User Guide and Technical Manual of INM Version 7.0

Release Notes of Previous Versions of INM

  • INM Version 7.0c (PDF) (January 3, 2011)
  • INM Version 7.0b (PDF) (September 30, 2009)
  • INM Version 7.0a (PDF) (September 17, 2008)
  • INM Version 6.2a (PDF) (November 30, 2006)
  • INM Version 6.2 (PDF) (May 22, 2006)
  • INM Version 6.1 (PDF) (March 4, 2003)